Formation of a New Substance Picture Vocabulary Matter and Energy

Element A pure substance composed of the same type of atom throughout.

Chemical Change A change that alters the identity of a substance resulting in a new substance or substances with different properties.

Physical Change A change to a substance that occurs without forming a new substance, such as a change in size or state of matter.

Chemical Property A characteristic that can only be observed or measured when atoms of matter rearrange during a chemical change.

Physical Property Characteristic that can be observed or measured without changing the substance; for example, color, melting point, or conductivity.

Compound A substance made of two or more elements that are chemically combined in fixed amounts.

Properties Physical and chemical characteristics of matter used to describe or identify a substance.

States of Matter Distinct forms of matter known in everyday experience: solid, liquid, and gas; also referred to as phases.

Production of Heat or Light Evidence of release of energy during a chemical change.

Production of a Precipitate Evidence of a new substance formed from a chemical change, resulting in solid particles that form or separate out of a liquid.

Production of Gas Evidence of a new substance formed from a chemical change.

Substance Any form of matter that is uniform throughout and has consistent properties.

Color Change A change in the way something reflects light, can indicate a chemical change.

Temperature Change Increase or decrease of heat energy in a substance may be evidence of a new substance formed during chemical change.

Anything that has mass and takes up space. Matter Anything that has mass and takes up space.